MQ 135 Air Quality Sensor Hazardous Gas Detector Module

Name: MQ 135 Air Quality Sensor Hazardous Gas Detector Module
SKU: MK-1923032431
Price: 2.99 USD
Availability: InStock

$2.99

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Estimated Delivery: Sep 25 – Sep 28

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Features:

MQ-135 gas sensor sensitive material used in clean air, low conductivity tin oxide (SnO2). When present in the environment pollution gas sensor, conductivity sensor with the increase in air pollution in the gas concentration increases. Using a simple circuit can convert the change in conductivity of the gas concentration corresponding to the output signal.
MQ135 ammonia gas sensor, sulfide, benzene vapor high sensitivity, smoke, and other harmful monitoring will also be ideal. The sensor can detect a variety of harmful gases, it is a low-cost sensor for a variety of applications.
Application:
Can be used for home and factory gas leakage monitoring devices, suitable for liquefied petroleum gas, butane, propane, methane, smoke, etc.

Specifications:

Model: MQ-135
Product Type: Semiconductor Gas Sensor
Detection gas: ammonia, sulfide, benzene vapor
Detection concentration: 10-1000ppm (ammonia, toluene, hydrogen)
Loop voltage (Vc): le24V DC
Heating voltage (VH): 5.0V plusmn 0.2V ACorDC
Load resistance (RL): adjustable
Heating resistance (RH): 31 Omega plusmn 3 Omega (room temperature)
Heating power consumption (PH): le900mW
Sensitive surface resistance (Rs): 2KOmega-20KOmega (in 100ppm NH3)
Sensitivity (S): Rs (in the air) / Rs (100ppm NH3) ge 5
Concentration slope (alpha): le 0.6 (R100ppm/R50ppmNH3)
Temperature, humidity: 20 deg C plusmn 2 deg C; 65% plusmn 5% RH
Standard test circuit: Vc: 5.0V plusmn 0.1V; VH: 5.0V plusmn 0.1V
Warm-up time: no less than 48 hours
Product dimensions: 32(L)*20(W)*22(H)
Special reminder:
After the sensor is powered on, it needs to be warmed up for about 20S to stabilize the measured data. It is normal for the sensor to heat up, because there is a heating wire inside, it will not be normal if the hand is hot.